Because AudioStreamTrack and VideoStreamTrack inherit from it.
Created attachment 213343 [details] patch
Comment on attachment 213343 [details] patch Are there any methods in these classes that can be final?
Comment on attachment 213343 [details] patch How did this even compile? Can any of the virtual functions in MediaStreamTrack be FINAL? If the entire class isn’t FINAL, it then becomes helpful to mark the functions themselves FINAL if there is no need to override them. r=me but I suggest adding some FINAL to any functions we don’t need to override.
I have a fix for this in the massive patch attached to https://bugs.webkit.org/show_bug.cgi?id=121940 if you want to let me take care of this.
I was thinking of landing this patch with the updates Darin and Alexey suggested. (In reply to comment #3) > (From update of attachment 213343 [details]) > How did this even compile? > It didn't :) Currently no port enables mediastream in their default build. Last week I started working on the GStreamer mediastream backend some other folks started some months ago. One part is in Bug 110150 but I haven't yet uploaded the version that actually builds.
Committed r157030: <http://trac.webkit.org/changeset/157030>